Beethod of lining pipe and pipe-fittings



Patented May 6, IQIJ.

G. IVIONRAIH. METHOD 0T LIIIIIIG PIPE AND PIPE FITTINGS.

APPLICATION FILED NOV. 30'. I 9I7.

SSIN" w IIIIIII entran srn'rns rnfrsn'r onirica GUSTAV MONMTH, 0F NEW YQRK., N. Y., ASSIGNOR T0 CHILE EVXPLOBATIN COMPANY,

0F NEW YORK, N. Y., A CDRPORATON 0F JERSEY.

METHOD 0F LNING PPE ANI) EIPE-FETTINGS. l

incarna.

Specification ot Letters latent.

Patented May d, i919.

original application med November 7, 1916, Serial No. 129,95@ Divided and this application filed November l to, 191'?. serial no. $044,713.

To all whom it may concern Be it known that l, GUSTAV MONRATH, a citizen of the United States, residing at New York city, in the county of New York, State of New York, have invented certain new and useful lmprovements in Methods of Lining Pipe and Pipe-Fittings; and l do hereby declare the following to be a full, clear, and exact descriptionot the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to corrosion-resisting and acid-resisting pipe, or pipe sections, or :fittings ot cast iron or other metal provided with a lining of a hard asphaltum mastic composition.

' rllhe invention relates more particularly to fittings and couplings and attachments for use with corrosion-resisting conduits which are themselves of a corrosion-resisting construction, such as conduits made of asphal-tum mastic compositions with metal reinforcing elements embedded therein.

This application constitutes a division of an application for patent iled by me on November 7 1916, lSerial No. 129,958, wherein the lined fittings and the method of making them are described', the claims of that application being limited to the fittings themselves, whereas the claim of this applicationis directed to the method of applying the lining. This method will be understood by reference to the following description taken in connection with the accompanying draw,- ings, which illustrate pipe and fittings lined in accordance with the invention. E

ln these drawings, Figure 1` shows a T coupling of cast iron provided with a corrosion-resisting or acid-resisting lining of the asphaltum cnmposition, the coupling be*- ing shown in central section; Figs. 2 and 3 show respectively an elbow and a Y connection or coupling of metal provided with a lining similar to that of Fig. 1; Fig. 4 shows a valve casing provided with a similar lining; Fig. 5 shows a pump casing and conduit provided with a similar lining; and Fig. 6 shows a modied form of couplingpr union as applied to the end of a reinforced mastic composition pipe section.

The material which has been found of particular value for use in the production of the corrosion-resisting lining is a composition of asp-halt which will give the greatest possible set with the least amount ot contraction. As a filler, a coarse rock sand with suftcient rough dust to ll the voids is well adapted for use. The amount of asphalt to sand should be so proportioned as to completely coat or lubricate every particle ot sand `and dust. A surplus of asphalt may, however, be used, since the necessary strength for resisting internal pressure is supplied by the cast iron to which the asphalt lining .is applied.

Figs. 1, 2 and 3, show respectively "l", elbow and Y couplings of cast iron or other appropriate metal provided with a lining of the asphalt composition. 'lhese couplings are flanged so that they can be secured to similar anged couplings. 'lhe lininglis so arranged that the sections or fittings will be corrosion-resisting and acid-proof throughout.

Referring to Fig. 1 it will be noted .that the iron Hanged 'l' coupling 27 has a lining `28 of the mastic composition which extends into recesses 29 at the Hanged end of the coupling to which a similar coupling is attached. 'lhe couplings are thus protected Where they come together so that there is a continuous linlng of the mastic composition throughout. The couplings niay further be connected by painting or coating the abutting ends, or by softening the composition Where it comes together so that the continuity of the lining may not be broken and permit escape of liquid where the couplings are joined together.

The elbow 30 of Fig. 2 is provided with a lining 31 similar to that ot Fi l, and the' f Y fitting-32 of Fig. 3 is provide with a similarlining 33. Fig. tvshows a valve casing 34 which is also lined with a mastic linin 35; Fig. 5 shows conventionally a centri gal pump 36, the casing of which is similarly provided with a lining 37.

`Fig. 6 shows a anged iron cou lin 38 connected to a pipe section 14 ma e o asphaltum' mastic compositiony provided with a metal reinforcing cylinder or insert. This reinforcing insert may be made of expanded metal wound with wire. v

The pipesection 14 is united to the flanged l iron coupling 38l by the composition 39' which is cast between the pipe section and litting and which extends within the iron fitting to form a lining therefor similar to the linings of the fittings of lgs. 1 to 5. This lining similarly extends into a recess 40 so that similar fittings may. be connected inthe manner above described.

Fittings such as that of Fig. 6 can be united directly to similar fit and pipe sections thus joined to each ot er through the intermediary of such cast iron couplings which are fastened to each other and which have a lining of a nature adapted to make the. conduit as a whole corrosionresisting. So also, fittings or couplin such as that of Fig. 6 may be united to ttings such as shown in Fi I to 5. That is to say,fthe fittings of Figs. 1 to 5 are adapted for use between pipe sections 14 which are provided with ittiiligs of the construction shown in Fig. 6. rovision is thus made for 'uniting com sition pipe sections to each other orto Y, elbow, valve or other fittings which may be uired in the handling of acids and other liquids.

Iii producing the linings in cast iron couplings or fittings, and in uniting pi e sections to such fittings, as in Fig. 6, t e cast ironv is thoroughly cleaned on the inside. A core of sheet iron or other appropriate material, clampedto ther with set screws or otherwise securedge together, is suitably placed and spacedwithin the iron fittings.

n the case of large fittings the sheet iron coreV may be made toretain its shape by disks of wood at the top, bottom and center. The core may beheld in place within the tting by iron spacers o r by other suitable means, and the castin' ofthe lining may, with advantage, be e ected by placing the fitting and core on an iron plate.

The fitting is then heated to a temperature nearly that of molten asphalt, and the mastic composition is then poured in little by little and equally distributed around the core. Where spacers are used at the beginningof the casting operation to hold the core in roper position, they may be gradually wit drawn as the mastic settles. After the lining has been completed, the mastic may be cooled, as by filling the core with- Similar castings requiring exact dimensions and a very hard composition for the lining,

it is necessary to use a core of wood or iron so constructed as to allow trapped air to escape freely. Burs appearing on the castings, owing to such vents, can be afterward smoothed ofi' with the trowel and templet.

I claim: The method of providing pipe fittings and couplings of cast iron or other metal with a lining of hard asphaltum mastic composition which comprises cleaning the metal, heating the same to a temperature approximately that of molten asphalt, casting a relatively thick layer of a hard asphaltum mastic composition Whose coeicient of expansion is smaller than that of said metal against the thus cleaned and heated metal, and quickly cooling the masticcom osition and permitting the metal to shrink t ereon; substantially as described.

In testimony whereof I aix my signature.

GUSTAV MONRATH.. 

